Absolutely. All the cast members in the shops, at guest services, and a few other places have lanyards with pins for trading. One night the ships officers were in the lobby to trade, and they were very generous.

I'd decorated my Fish Extender with pins and my host noticed, so gave me a really cute Minnie driving a car. They have special pins for the ships, and 'mystery' pins for sale in the shops.

We gave pins in our FE, and even got some back from the kids in trade.